How to retain original application image in case user enters in bootloader mode but doesnt update new image?

[Newbie]

Hello,

I am using sdk12.2.2 and nrf52832 customised board. My use case is as follows.

Suppose user enters in dfu mode trough app and for example user doesn't update new image so my device is in bootloader mode. I want that after 5 mins device should jump back to application mode if there is no new firmware update from app.

I am using sdk_12.2.2\examples\dfu\bootloader_secure code.

Suggest me changes in this code.

Thanks,

[tesc]

Hi,

I assume that you mean SDK 12.2.0.

We added a configurable inactivity timeout timer for the DFU bootloader in SDK 14.0.0, so if using a newer SDK is an option you can do that. Alternatively you may of course have a look at that implementation and add it to the SDK 12 bootloader.

There are also suggestions in other threads here on DevZone, such as using the watchdog timer (WDT) or using the real-time counter (RTC).

Regards,
Terje